Impasto, also known as modelling compound or texture medium is a medium that gives texture and heavy body to the paint. This medium is a heavy-bodied paint, free of colour pigmentation. It is most valuable for heavy-bodied impasto techniques, particularly when heavy built-up areas of colour are required.

Impasto Medium dries to a low subdued sheen which is similar to the sheen on a dried paint film of acrylic colour. It is equally water-resistant. Impasto Medium allows for free intermixing with the Derivan colours in any proportion